Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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1. 1:100,000 Digital Raster Graphics for Delaware: Delaware, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

2. 1:100,000 Digital Raster Graphics for Maryland

1995. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

3. 1:100,000 Digital Raster Graphics for Virginia: Virginia, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

4. 1:100,000 Digital Raster Graphics for West Virginia: West Virginia, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

5. 1:100,000 Digital Raster Graphics: Maryland, 2000

1995. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

6. 1:100k Digital Raster Graphic - Collars Removed: Minnesota

2015. U.S. Geological Survey (USGS) and Minnesota Department of Natural Resources (DNR). A digital raster graphic (DRG) is a scanned image of an U.S. Geological Survey (USGS) standard series topographic map, including all map collar inf...

7. 1:24,000 - 7.5 minute Digital Raster Graphics for Maryland: Maryland, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

8. 1:24,000 - 7.5 minute Digital Raster Graphics for the District of Columbia: District: District of Columbia, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

9. 1:24,000 - 7.5 minute Digital Raster Graphics for West Virginia: West Virginia, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

10. 1:24,000 - 7.5 minute Digital Raster Graphics: New Jersey, 2000

1995. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

11. 1:24k Digital Raster Graphic - Collars Removed: Minnesota

2015. U.S. Geological Survey (USGS) and Minnesota Department of Natural Resources (DNR). A digital raster graphic (DRG) is a scanned image of an U.S. Geological Survey (USGS) standard series topographic map, including all map collar inf...

12. 1:250,000 Digital Raster Graphics for Delaware: Delaware, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

13. 1:250,000 Digital Raster Graphics for Maryland

1995. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

14. 1:250,000 Digital Raster Graphics for Maryland: Maryland, 2000

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

15. 1:250,000 Digital Raster Graphics for Virginia: Virginia, 2000

1996. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

16. 1:250,000 Digital Raster Graphics for West Virginia: West Virginia, 2000

1995. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

17. 1:250k Digital Raster Graphic - Collars Removed: Minnesota

1998. U.S. Geological Survey and Minnesota DNR. A digital raster graphic (DRG) is a scanned image of an U.S. Geological Survey (USGS) standard series topographic map, including all map collar inf...

18. 2009 Wild and Scenic River Aerial Oblique CIR Photo Index: Minnesota

2014. Minnesota Department of Natural Resources (DNR). Index to high quality Color Infrared oblique aerial imagery of Minnesota wild and scenic river system. Leaf off, snow off conditions. Feature class...

19. 2017 Polling Places PDF Map: Carver County, Minnesota, 2017

2017. CarverGIS. A downloadable, printable 20 x 20 inch PDF map of Carver County's voting districts and polling places as of 2017.

20. 7.5 minute digital elevation models (DEM) for the District of Columbia (30 meter): Washington DC, 2000

1979. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

21. 7.5 minute digital elevation models (DEM) for Virginia (30 meter): Virginia, 2000

1979. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

22. 7.5 minute digital elevation models (DEM) for West Virginia (30 meter): West Virginia, 2000

1979. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

23. 7.5 minute Digital Raster Graphics for Pennsylvania - UTM - cropped collars: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars, georeferenced to the UTM grid.

24. 7.5 minute Digital Raster Graphics for Pennsylvania - UTM grid - NAD 1983 - cropped collars: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars, georeferenced to the UTM gr...

25. 7.5 minute Digital Raster Graphics for Pennsylvania- Albers - cropped collars: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars in Albers projection.

26. 7.5 minute Digital Raster Graphics for Pennsylvania UTM grid - NAD 1983: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

27. 7.5 minute Digital Raster Graphics UTM: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

28. Aerial Imagery: Iowa, 2016

2016. Iowa Homeland Security and Emergency Management. This aerial imagery was flown in the spring of 2016 over the eastern part of the state. it is four-band imagery that includes the near-infra-red ba...

29. Aerial Photography: Carver County, Minnesota, 2005

2005. CarverGIS. Carver County 2005 Aerometric Imagery.

30. Aerial Photography: Carver County, Minnesota, 2008

2008. CarverGIS. Carver County 2008 Pictometry Imagery.

31. Aerial Photography: Carver County, Minnesota, 2011

2011. CarverGIS. Carver County 2011 Pictometry Imagery.

32. Aerial Photography: Carver County, Minnesota, 2013

2013. CarverGIS. Carver County 2013 Aerometric Imagery.

33. Aerial Photography: Iowa, 1930s

1930. Iowa DNR. This dataset represents panchromatic orthophoto imagery produced from black and white aerial photographs. This dataset was developed from individua...

34. Aerial Photography: Iowa, 1950s

1950. Iowa DNR. This dataset represents panchromatic images produced from black and white aerial photographs. This dataset was developed from individual aerial ima...

35. Aerial Photography: Iowa, 1960s

1960. Iowa DNR. This dataset represents panchromatic images produced from black and white aerial photographs. This dataset was developed from individual aerial ima...

36. Aerial Photography: Iowa, 1970s

1970. Iowa DNR. This dataset represents panchromatic images produced from black and white aerial photographs. This dataset was developed from individual aerial ima...

37. Allegheny County - Blocks: Pennsylvania, 2002

2002. Allegheny County Division of Computer Services Geographic Information Systems Group. Derived from original MAPINDX: Map Index Sheets from Block and Lot Grid of Property Assessment and based on aerial photography, showing 1983 datum ...

38. Allegheny County - Contours: Pennsylvania, 2006

2006. Allegheny County Division of Computer Services Geographic Information Systems Group. Contour data was created as a result of a county flyover in the spring of 2004. Contours were created from a DTM Feature Dataset, upgraded by Baker...

39. Allegheny County - Slopes: Pennsylvania, 2010

2010. Allegheny Places Design Team. Slope data.

40. Allegheny County - Spot Elevation: Pennsylvania, 2006

2006. Allegheny County Division of Computer Services Geographic Information Systems Group. Spot Elevation data was created as a result of a county flyover in the spring of 2004. They were created from a DTM Feature Dataset, upgraded by Ba...

41. Allegheny County - Urban Tree Canopy: Pennsylvania, 2010

2010. University of Vermont Spatial Analysis Laboratory and Allegheny County Division of Computer Services Geographic Information Systems Group. Allegheny County Urban Tree Canopy. High resolution land cover dataset for Allegheny County, Pennsylvania.

42. Allegheny County Imagery 2010 - Tile Index: Pennsylvania, 2010

2010. Allegheny County Division of Computer Services Geographic Information Systems Group. TILE INDEX - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

43. Allegheny County Imagery 2010: Pennsylvania, 2010

2010. Allegheny County Division of Computer Services Geographic Information Systems Group. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

44. Allegheny County Imagery 2013 - Tile Index: Pennsylvania, 2013

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Tile Index - Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for c...

45. Allegheny County Imagery 2013: Pennsylvania, 2013

2013. Allegheny County Division of Computer Services Geographic Information Systems Group. Orthophotos of Allegheny County, Pennsylvania - An orthoimage is remotely sensed image data that has been positionally corrected for camera lens di...

46. Andreas Atlas: Iowa, 1875

1875. Iowa DNR. This dataset is a georectified image of the Illustrated Historical Atlas of the State of Iowa, 1875 by A.T. Andreas. The David Rumsey Map Collectio...

47. Aquatic Resources Combined - Central Appalachian Forest Ecoregion: Pennsylvania, 2010

2010. Natural Lands Trust. This raster dataset is a compilation of several data sets that have been combined to create an overall aquatic resources conservation value raster ...

48. Aquatic Resources Combined - High Allegheny Plateau Ecoregion: Pennsylvania, 2010

2010. Natural Lands Trust. This raster dataset is a compilation of several data sets that have been combined to create an overall aquatic resources conservation value raster ...

49. Base Flood Elevation: Carver County, Minnesota

2014. CarverGIS. 2010 FEMA DFIRM base flood elevations.

50. Benton Township PDF Map: Carver County, Minnesota

2017. CarverGIS. A downloadable, printable 8.5 x 11 inch PDF map of Benton Township and surrounding area.